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Discussion

Particle size distribution matters as well as overall fineness because it affects

  • A.the temperature that was reached in the burning zone
  • B.packing, water demand and the rate of strength gain
  • C.the colour of the finished cement as it is dispatched
  • D.the chemical composition of the clinker that was used

Answer: B

Two cements of identical Blaine figure can behave quite differently if one has a wide spread of sizes and the other a narrow one. A well-graded distribution packs more densely and can reduce the water needed for a given workability.

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